Titan Panel [Elemental Overflow]

Major refactor and improved lang support

This version refactors the code to retrieve the currency by its ID instead of searching for it within the known currencies by icon.

It also automatically gets the currency name, description, and quality from the currency info object, not requiring to specify the name and description in the translations anymore. This way, the addOn now partially supports all languages that WoW supports (just a few translations will still need to be added manually).

Finally, missing esMX translations are being added.